Advanced Search

Hmm that's odd ; I uploaded it but it seems it didn't load or attached, apologizes hopefully this time it works .

The main hal file: plasma_v2.hal
has not been attached.

Yes of course thank you so much for your help!

see attached 

Thank you for clearing that up, although should have been at the very first post.
Your servo period set at 25597 was what sent me in that direction, that should not be edited normally.

Can you post your hal/ini files?
 

I used the same exact values for my AXIS setup. I didn't randomly guess them, they operate well on AXIS. My whole machine worked with GRBL for 2-3years straight no issues, i just couldn't achieve THC with GRBL & would sometimes have issues with EMI.

Setup:
7i96 with THCAD-10
Nema 23 495oz motors(1.8degree , 3amps max) with
TB6600 drivers(running 1/4 microstepping at 3amps max) (i will upgrade them later after i sort this out), two 36v supplies(10amp each),
SFU1605 Ballscrew on all axis'. 

(It was a somewhat budget build)

My stepper scale is perfect at 2032, max velocity of 150in/min(~3800mm/min) and max accel of 50inch/sec^2 (~1270mm/sec^2).

I've played around and purposely made the machine loses steps and it happens around 200 inches/min, 180 it stabilizes and 150 is what i chose as extra margin of safety.


I only used chatgpt for coding questions or how to edit bios etc, my master's degree is in AI (i'll be done in May 2025); Ironically I'm struggling to figure this one out..lol , but i will not give up ! Even if l have to read the whole entire LinuxCNC PDF and QTplasma documents or learn how the code itself works, i will do it!

 

 

mal136 wrote:

...the machine moved but the stepper motors just kinda danced back and forth they didnt actually move the gantry at all. 

Any advice on why that is occuring?

Probably because the scaling, velocities and accelerations are not set properly.
My advice: Stop using chatGPT, it can not help with these types of issues, yet, set the values properly in PncConf, not just random values. Read about how to get those values right based on what you actually have on your machine.
Or take some pictures of the machine and upload them here, we can figure out a lot from pictures.

I changed the "servo period" to 1000000 and i re-did the config using PNFconfig and the machine moved but the stepper motors just kinda danced back and forth they didnt actually move the gantry at all. 

Any advice on why that is occuring?

My jitter went up a lot for some reason and was measuring 46060 for servo thread and 44293 for base thread.

Do i have a hardware issue with my computer ? I'm reading through the linxcnc documents and QTplasma docx as we speak but it doesnt really dive into some of these issues so im a bit lost on what i can do to resolve this.

I'm sorry to be a burden and i hope it doesnt come off as annoying but im really trying my best here , dedicating hours of trial and error and endless chatgpt questions to learn.

Thank you again everyone for your help, this is my first linuxcnc machine.

I'm genuinely confused how AXIS works perfectly fine and QTplasma doesn't operate as it should, any idea why?

PCW wrote:

Unexpected realtime delay on task 0 with period 25597

Is this a parallel port setup? (25597 sounds like a parallel port base thread time)

EDIT I see this is a 7I96S configuration but the 25597 thread period makes no sense
in that setup.

 

PCW already mentioned the issue, you have to fix it in your ini file, set the "servo period" to 1000000 ( 1 million), save and start the config again.

It is a Mesa 7i96 via ethernet cable, i'm not sure what is consider normal for that value but AXIS worked fine so im confused how it affects QTplasma.

very odd

im using a Dell optiplex 780 , What is strange to me is that AXIS works fine on the same exact settings but QTplasma has that error and thus i can't use the THCAD-10 , which was the whole point of me upgrading to the MESA hardware.i did disable dell's performance throttle in the bios and jitter was 15886 , which still didnt alleviate the error on QTplasma when i tried a new PnfConfig..


CPU(from terminal via "lscpu"): Intel core 2 duo CPU E8500 @ 3.16GHz
Network: (from terminal via "lspci -nn | grep -i net"): intel corp 82567LM-3 gigabit network connection(rev 2)

I dont have that option, see attached. only Qtplasma

Unexpected realtime delay on task 0 with period 25597

Is this a parallel port setup? (25597 sounds like a parallel port base thread time)

EDIT I see this is a 7I96S configuration but the 25597 thread period makes no sense
in that setup.

 

You error is nothing to do with Linuxcnc but related to your hardware. We need to know about your PC, (CPU and network card) First you need to disable any power saving features in your bios that affects latency.

Then follow my advanced guide here which covers all of the gotchas with modern hardware and operating systems.
docs.google.com/document/d/1jeV_4VKzVmOI...diY/edit?usp=sharing

Try this

Read on the right side how to ....